Physicomechanical Assessments and Heavy Metals’ Leaching Potential of Modified Asphalt Binders Incorporating Crumb Rubber and Tin Slag Powders

Table 7

Metal elements’ concentrations on bitumen, crumb rubber powder, and tin slag leachate solution.

Metal elements	Bitumen (ppm)	Crumb rubber (ppm)	Tin slag (ppm)
Calcium (Ca)	0.538	26.050	19.341
Chromium (Cr)	—	0.007	0.003
Iron (Fe)	0.034	2.275	5.921
Magnesium (Mg)	0.116	1.020	3.369
Manganese (Mn)	—	0.035	0.466
Molybdenum (Mo)	0.077	0.108	0.256
Nickel (Ni)	—	0.035	0.034
Antimony (Sb)	0.074	0.045	0.051
Selenium (Se)	0.134	0.235	0.78
Titanium (Ti)	0.044	0.049	0.050
Vanadium (V)	0.005	0.011	0.046
Zinc (Zn)	0.152	61.81ACT5	0.495